15
RailKing NW-2 Operating Manual
RAILKING
SELF-RECHARGING BATTERY BACKUP SYSTEM
ProtoSounds® state-of-the-art design includes a self-recharging battery
backup system for improved performance at any speed. The self-recharging
battery backup system is automatically turned on or off whenever track
power is turned on or off. There are no switches to turn on or off to enjoy
the benefits of the automatic battery backup system. The battery ensures
that power to the sound system will remain on during directional changes,
setting RESET options, or when traveling over dirty track and switches.
The battery is a rechargeable NiCad type which is continually charged
from the track when power is applied. NiCad batteries are a dry battery and
should not leak or cause any damage to your locomotive and will last up to
five years or longer. If you notice that the sounds seem distorted or garbled
at low voltages or become silent when power from the transformer is shut
off, the battery may be going bad. Before replacing the battery, you should
put the engine in NEUTRAL and leave the transformer throttle at about 12
volts for fifteen minutes. This should temporarily recharge the battery. If
the garbled or distorted sounds are reduced, then your battery charge has
worn down. You can give your battery a full charge by leaving the engine
ON in NEUTRAL for 16 to 18 hours.
REPLACING THE PROTOSOUND® BATTERY
If you notice that the sounds seem distorted or garbled at low voltages or
become silent when power from the transformer is shut off, the battery may
be going bad. Before replacing the battery, you should put the engine in
NEUTRAL and leave the transformer throttle set at about 12 volts for 15
minutes. This should temporarily recharge the battery. If the garbled or
distorted sounds are reduced, then your battery charge has worn down. You
can give your battery a full charge by leaving the engine ON in the
NEUTRAL position for 18 hours. (Make sure the smoke unit switch is in
the OFF position to prevent harm to the smoke unit wicking).
If you need to replace the battery, replacement ProtoSound® batteries are
available from MTH ProtoSound® Electronics at 7020 Columbia Gateway
Drive, Columbia, MD 21046. A standard 9v alkaline battery can be
substituted as a temporary fix, but since alkaline batteries can’t take a
charge, it will eventually wear down. Regardless, it should give you a week
to a couple of months use while you wait for your replacement
ProtoSound® battery to arrive.
